46 C.F.R. § 113.37-10 Detailed requirements.
Title 46 - Shipping
(a) Each indicator must be independent of the propulsion control system. A failure of the propulsion control system must not affect the operation of the indicators. (b) Each electric component or its enclosure must meet NEMA 250 Type 4 or 4X or IEC IP 56 requirements. [CGD 74–125A, 47 FR 15272, Apr. 8, 1982, as amended by CGD 94–108, 61 FR 28290, June 4, 1996]
Title 46: Shipping
PART 113—COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT
Subpart 113.37—Shaft Speed and Thrust Indicators
§ 113.37-10 Detailed requirements.
